Asymmetric load control for torsion fatigue reduction in a wind turbine tower

(19)

(11)

EP 2 713 048 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	04.04.2018 Bulletin 2018/14

(43)	Date of publication A2:
	02.04.2014 Bulletin 2014/14

(21)	Application number: 13185343.4

(22)	Date of filing: 20.09.2013

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International Patent Classification (IPC):

F03D 7/02^(2006.01)

(84)	Designated Contracting States:
	AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
	Designated Extension States:
	BA ME

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Priority:

27.09.2012 US 201213628096

(71)	Applicant: General Electric Company
	Schenectady, NY 12345 (US)

(72)	Inventors:
	Perley, Thomas Franklin Greenville, SC South Carolina 29615 (US) Gerber, Brandon Shane Greenville, SC South Carolina 29615 (US)

(74)	Representative: Bedford, Grant Richard
	GPO Europe GE International Inc. The Ark 201 Talgarth Road Hammersmith London W6 8BJ London W6 8BJ (GB)

(54)	Asymmetric load control for torsion fatigue reduction in a wind turbine tower

(57) A method (600) and system (25) for reducing a torsional movement and/or a torsional loading of a tower 42) of a wind turbine (10) is disclosed includes generating a tower torsion signal with a detection system and providing the signal to an asymmetric load control assembly (100). The tower torsion signal may correspond to an actual torsional movement of the tower or a torsional loading of the tower (12). The asymmetric load control assembly (100) is configured to mitigate an asymmetric load acting on the wind turbine (10) using the tower torsion signal.

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